package com.beans;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;

import javax.annotation.Resource;

//使用构造方式实现bean注入(官方推荐)
@Controller
public class UserController3 {
    private  UserService userService;

    @Autowired
    public UserController3(UserService userService) {
        this.userService=userService;

    }
    public  void sayHi(){
        userService.sayHi();
    }



}
